TFEB–GDF15 axis protects against obesity and insulin resistance as a lysosomal stress response
TFEB, a key regulator of lysosomal biogenesis and autophagy, is induced not only by nutritional deficiency but also by organelle stress. Here, we find that Tfeb and its downstream genes are upregulated together with lipofuscin accumulation in adipose tissue macrophages (ATMs) of obese mice or humans...
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Veröffentlicht in: | Nature metabolism 2021-03, Vol.3 (3), p.410-427 |
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Sprache: | eng |
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Zusammenfassung: | TFEB, a key regulator of lysosomal biogenesis and autophagy, is induced not only by nutritional deficiency but also by organelle stress. Here, we find that
Tfeb
and its downstream genes are upregulated together with lipofuscin accumulation in adipose tissue macrophages (ATMs) of obese mice or humans, suggestive of obesity-associated lysosomal dysfunction/stress in ATMs. Macrophage-specific
TFEB
-overexpressing mice display complete abrogation of diet-induced obesity, adipose tissue inflammation and insulin resistance, which is independent of autophagy, but dependent on TFEB-induced GDF15 expression. Palmitic acid induces
Gdf15
expression through lysosomal Ca
2+
-mediated TFEB nuclear translocation in response to lysosomal stress. In contrast, mice fed a high-fat diet with macrophage-specific
Tfeb
deletion show aggravated adipose tissue inflammation and insulin resistance, accompanied by reduced GDF15 level. Finally, we observe activation of TFEB–GDF15 in ATMs of obese humans as a consequence of lysosomal stress. These findings highlight the importance of the TFEB–GDF15 axis as a lysosomal stress response in obesity or metabolic syndrome and as a promising therapeutic target for treatment of these conditions.
Kim et al. reveal that TFEB expression is protective in the setting of diet-induced obesity by activating the expression of GDF15 in adipose tissue macrophages in mice and humans. |
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ISSN: | 2522-5812 2522-5812 |
DOI: | 10.1038/s42255-021-00368-w |